25570776740 has 12 divisors (see below), whose sum is σ = 53698631196. Its totient is φ = 10228310688.

The previous prime is 25570776689. The next prime is 25570776743. The reversal of 25570776740 is 4767707552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10457516644 + 15113260096 = 102262^2 + 122936^2 .

It is not an unprimeable number, because it can be changed into a prime (25570776743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639269399 + ... + 639269438.

It is an arithmetic number, because the mean of its divisors is an integer number (4474885933).

Almost surely, 2^25570776740 is an apocalyptic number.

25570776740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25570776740 is an abundant number, since it is smaller than the sum of its proper divisors (28127854456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25570776740 is a wasteful number, since it uses less digits than its factorization.

25570776740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278538846 (or 1278538844 counting only the distinct ones).

The product of its (nonzero) digits is 2881200, while the sum is 50.

The spelling of 25570776740 in words is "twenty-five billion, five hundred seventy million, seven hundred seventy-six thousand, seven hundred forty".